ppsspp/SDL/SDLJoystick.cpp

#include "SDL/SDLJoystick.h"

#include <iostream>

extern "C" {
	int SDLJoystickThreadWrapper(void *SDLJoy){
		SDLJoystick *stick = static_cast<SDLJoystick *>(SDLJoy);
		stick->runLoop();
		return 0;
	}
}

SDLJoystick::SDLJoystick(bool init_SDL ): running(true),joy(NULL),thread(NULL){
	if (init_SDL)
	{
		SDL_Init(SDL_INIT_JOYSTICK | SDL_INIT_VIDEO
#ifndef _WIN32
				| SDL_INIT_EVENTTHREAD
#endif
				);
	}
	fillMapping();

	int numjoys = SDL_NumJoysticks();
	SDL_JoystickEventState(SDL_ENABLE);
	if (numjoys > 0) {
		joy = SDL_JoystickOpen(0);
	}
}

SDLJoystick::~SDLJoystick(){
	if (thread)
	{
		running = false;
		SDL_Event evt;
		evt.type = SDL_USEREVENT;
		SDL_PushEvent(&evt);
		SDL_WaitThread(thread,0);
	}
	SDL_JoystickClose(joy);
}

void SDLJoystick::startEventLoop(){
	thread = SDL_CreateThread(SDLJoystickThreadWrapper, static_cast<void *>(this));
}

void SDLJoystick::ProcessInput(SDL_Event &event){
	switch (event.type) {
	case SDL_JOYAXISMOTION:
		{
			AxisInput axis;
			axis.axisId = SDLJoyAxisMap[event.jaxis.axis];
			// 1.2 to try to approximate the PSP's clamped rectangular range.
			axis.value = 1.2 * event.jaxis.value / 32767.0f;
			if (axis.value > 1.0f) axis.value = 1.0f;
			if (axis.value < -1.0f) axis.value = -1.0f;
			axis.deviceId = DEVICE_ID_PAD_0;
			axis.flags = 0;
			NativeAxis(axis);
			break;
		}

	case SDL_JOYBUTTONDOWN:
		{
			KeyInput key;
			key.flags = KEY_DOWN;
			key.keyCode = SDLJoyButtonMap[event.jbutton.button];
			key.deviceId = DEVICE_ID_PAD_0;
			NativeKey(key);
			break;
		}

	case SDL_JOYBUTTONUP:
		{
			KeyInput key;
			key.flags = KEY_UP;
			key.keyCode = SDLJoyButtonMap[event.jbutton.button];
			key.deviceId = DEVICE_ID_PAD_0;
			NativeKey(key);
			break;
		}

	case SDL_JOYHATMOTION:
		{
#ifdef _WIN32
			KeyInput key;
			key.deviceId = DEVICE_ID_PAD_0;

			key.flags = (event.jhat.value & SDL_HAT_UP)?KEY_DOWN:KEY_UP;
			key.keyCode = NKCODE_DPAD_UP;
			NativeKey(key);
			key.flags = (event.jhat.value & SDL_HAT_LEFT)?KEY_DOWN:KEY_UP;
			key.keyCode = NKCODE_DPAD_LEFT;
			NativeKey(key);
			key.flags = (event.jhat.value & SDL_HAT_DOWN)?KEY_DOWN:KEY_UP;
			key.keyCode = NKCODE_DPAD_DOWN;
			NativeKey(key);
			key.flags = (event.jhat.value & SDL_HAT_RIGHT)?KEY_DOWN:KEY_UP;
			key.keyCode = NKCODE_DPAD_RIGHT;
			NativeKey(key);
#else
			AxisInput axisX;
			AxisInput axisY;
			axisX.axisId = JOYSTICK_AXIS_HAT_X;
			axisY.axisId = JOYSTICK_AXIS_HAT_Y;
			axisX.deviceId = DEVICE_ID_PAD_0;
			axisY.deviceId = DEVICE_ID_PAD_0;
			axisX.value = 0.0f;
			axisY.value = 0.0f;
			if (event.jhat.value & SDL_HAT_LEFT) axisX.value = -1.0f;
			if (event.jhat.value & SDL_HAT_RIGHT) axisX.value = 1.0f;
			if (event.jhat.value & SDL_HAT_DOWN) axisY.value = 1.0f;
			if (event.jhat.value & SDL_HAT_UP) axisY.value = -1.0f;
			NativeAxis(axisX);
			NativeAxis(axisY);
#endif
			break;
		}
	}
}

void SDLJoystick::runLoop(){
	while (running){
		SDL_Event evt;
		int res = SDL_WaitEvent(&evt);
		if (res){
			ProcessInput(evt);
		}
	}
}